The paper considers the task of developing a system-object simulation model of technological operations implemented during the formation of a combined channel signal with the required characteristics. To develop the model, the method of system-object simulation is used, implemented in the UFOModeler software package. In accordance with the calculus of systems as functional objects, the design of structural components of a system-object model of technological operations is considered. Here sets of stream and nodal objects of the model are formulated. Further, algorithms for the functioning of each distinguished technological operation are developed. The developed system-object model is implemented using software tools for simulation of processes and UFOModeler systems. The resulting model allows you to simulate the process of linear-frequency modulation of the signal in real time. Moreover, the system-object model implements the modulation mechanism of the combined signal through the use of a time-frequency matrix, the configuration of which, in turn, depends on the given levels of structural and energy secrecy.